when I find stuff like
or the end of curves dont match, and so the curves are open and not closed
any command that quckly fixes those?
closecrv makes a mess
There is no clean mathematical way to make this sort of edit.
You will need to make the decisions about the best fixes for each curve.
This will be “Point editing”.
Select the curve to see it’s end and control points. Maybe turn on CurvatureGraph so help with the decision. Then move an end point to eliminate the gap or overlap. Undo (Ctrl Z) to change your mind and try something else.
In some cases - if the curve endpoints lie on the curves but there are overlaps etc. - you might be able to get away with using CurveBoolean to find a complete closed outline. If it won’t resolve to a definite region in the command, you will need to edit the end points first.
on software like maya/blender there’s a function that unifies points based on distance…